Activation and installer fixes

Cleaner 1.0.19 restores license activation verification and fixes the EXE update button selecting MSI.

Activation and installer fixes

License activation: Official builds now always include the pinned verification key required to validate your license.

The right installer: Download Setup (.exe) now requests EXE explicitly. MSI has its own action, and both links are checked against the selected format.

Windows icons retain native display-scale selection. Halloween appearance remains optional and ends automatically on 2 November, Romania time.